Fresh fruit and vegetables can be contaminated with norovirus, the winter
vomiting bug, and are probably transmitting the illness to people,
scientists warn.

Dirty water taken from farm wells or streams and used to dilute fertilisers is
introducing the virus into the food chain, a study found.

Scientists advised consumers to wash fruit and vegetables and said that buying
organic produce, where the use of pesticides is limited, reduced the risk of
transmission. However, washing produce would not necessarily eliminate any
live virus, they said, and called for stricter measures on water sanitation
in agriculture.